What was the theory about the origin of the solar system proposed by scientists Immanuel Kant and Pierre Simon Laplace?
The Kant-Laplace nebular hypothesis. Kant’s central idea was that the solar system began as a cloud of dispersed particles. He assumed that the mutual gravitational attractions of the particles caused them to start moving and colliding, at which point chemical forces kept them bonded together.
What is Laplace’s theory?
what is now called Laplace’s nebular hypothesis, a theory of the origin of the solar system. Laplace imagined that the planets had condensed from the primitive solar atmosphere, which originally extended far beyond the limits of the present-day system.
What is Laplace’s hypothesis on the Sun?
Laplace said that the material from which the solar system was formed was once a slowly rotating cloud, or nebula, of extremely hot gas. The gas cooled and the nebula began to shrink. These rings condensed into planets and their satellites, while the remaining part of the nebula formed the sun.
Why did Laplace say the Sun began to rotate faster?
He argued that as a hot nebula cooled, it would require a proportionately faster rate of rotation in order to conserve its angular momentum, and the increased centrifugal force resulting from this increased speed would throw out material which would eventually condense into planets.
What are the 6 stages of nebular theory?
Terms in this set (6)
- Formation begins and gravity causes the nebula to contract.
- gravity pulls in the mass of the nebula in, then starts spinning, then the disk forms (planetary, solar disk); gravitational energy gets converted to thermal energy (heat); gets so hot, then nuclear fusion, then the sun is born.
What was the problem of Kant Laplace’s nebular theory which was solved by the solar nebular theory?
Another problem with the nebular hypothesis was the fact that, whereas the Sun contains 99.9 percent of the mass of the solar system, the planets (principally the four giant outer planets) carry more than 99 percent of the system’s angular momentum.
What aspects of the solar system are explained by Laplace’s hypothesis of how the solar system formed?
Laplace theorized that the Sun originally had an extended hot atmosphere throughout the Solar System, and that this “protostar cloud” cooled and contracted. As the cloud spun more rapidly, it threw off material that eventually condensed to form the planets.
Who proposed solar nebula theory?
solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation. Swedish philosopher Emanuel Swedenborg in 1734 proposed that the planets formed out of a nebular crust that had surrounded the Sun and then broken apart.
What are the steps in forming a solar system?
Answer: Three Stages Of Formation Of Planets: After becoming distinct planets, they went through four stages of formation: Differentiation, Cratering, Flooding and Surface Evolution. For Earth, these changes led to the planet we know today, layered with an iron core, a weathered, shifting surface, water and life.